Exercise device



FIG. 1 is a perspective view of the exercise device showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a back view thereof; and,

FIG. 4 is a top plan view thereof.

The broken line showing of portions of the exercise device form no part of the claim. 

CLAIM I claim the ornamental design for an exercise device, as shown and described. 